Window-sash fastener.



UNITED STATES' PATENT oFFroE.

JQHN S. RAPSON, OF ELKINS PARK, PENNSYLVANIA.

WINDOW-SASH FASTENER.

To all whom it may concern.

Be it known that I, JoHN S. RAPSONJ of Elkins Park, county of Montgomery, and State of Pennsylvania, have invented an Improvement in VVindow-Sash Fasteners, of which the following is a specification.

My invention has reference to windowsash fasteners and consists of certain improvements which are fully set forth in the following specification and shown in the accompanying drawings, which form a part thereof.

My object is to provide a construction of fastener whereby eitherwindow-sash may be left slightly open for ventilating purposes while atthe same time insuring the locking of-the sashes against further opening.

My'invention consists of a sash fastener comprising a spring bolt adapted for attachment to one sash and combined with a mule tiple-toothed keeper adapted for attach ment to the other sash and with either tooth of which the boltengages.

My invention also consists in forming the sash fastener above specified of sheet metal in certain form illustrated and hereinafter described.

My invention further comprehends details of construction which, together with the features above specified, willbe better understood by reference to the drawings, in

Figure 1 is a perspective view of awindowsash fastener embodying my invention; Fig.

2 is a sectional side elevation of the same Fig. 3 is a crosssection of the keeper on line 33 of Fig. 2; and Fig. 4 is a cross section of the spring bolt part of the fastener on line 4-4 of Fig. 2.

A is the lower window-sash and B the upper sash. C is the keeper and is'preferably made of sheet metal in the form shown.

The body part is bent in inverted U-shape screws y which the keeper is attached to the sash.- While I have shown this keeper of sheet metal in the arch form it is to be understood that I do not confine myself thereto as lfiatented Dec. 22, 1908.

forced outward by a coil spring'M surrounding the shank and pressing at one end against one of the portions J and at the.

other end against the knob N extending upwardly from the shank. The knob N in striking against the other portion J of the case limits the outward movement of the bolt L under the action of. the spring M. The under forward surface of the bolt L is beveled so as to freely work down over the teeth D of the keeperbut so as to engage the sairtll teeth when attempt is made to raise the sas I The case for the s ring bolt is preferably made of sheet meta parts one fitting over the other. The under part or base. J is provided with the two upwardly extending guide portions J before referred to and also with the lateral grooved side portions J. The top plate I is made box-shaped and is provided with side flanges I which slide into the grooved portions J of the base late. Screw holes P are formed through til which to attach the case to the lower sash A. By making the parts J 2 equal to the width of the top art I it braces the box form of said and is made in two e enga ing parts J I for screws by part an makes it very strong and locks the Figs. 1 and 2, the window-sashes are fully closed and locked. If from any cause either the upper sash or the lowersash does not fully close, then the spring bolt L automatically en ages whichever tooth D of the keeper which appens to .be immediately above it and in that manner'locks the sashes even though not fully closed. Ordinarily, the

middle tooth is the one engaged under the last specified conditions. In cases when both the upper and lower sashes were not fully closed the upper tooth will be the one engaged by the bolt. This would also be the case Where, for ventilation, one of the sashes was purposely left open to a slight extent.

My invention obviates dangers of unlocked windows from carelessness or defective working and permits ventilation with locked windows.

While I have shown the sash fastener in the form I have found it excellently adapted for commercial use, I do not limit myself to the details thereof, as these may be modified without departing from the spirit of my invention.

Having now described my invention what I claim. as new and desire to secure by Letters Patent, is

1. In a sash fastener, the combination of a keeper formed of two upright sheet metal portions having their flat surfaces substantially parallel and united at the .top and'hav ing their forward edges formed with ratchet teeth, and a locking device arranged upon that side of the keeper adjacent to the ratchet teeth and provided with a wide spring actuated bolt extending across both of the upright portions of the keeper and engagin the teeth thereof.

2. n a sash fastener the keeper, combined with the locking bolt device consisting of a sheet metal case comprising the base J havingthe upwardly extending guide flanges J 2 and grooved sid'e flanges J and the box part I fitting over the base and having the side flanges I sliding into the grooved sideflanges of the base, combined with a bolt L fitting the case and having the shank L guided in the flanges J 2 thereof, and a spring M surrounding the bolt shank and resting against one of the guide flanges J 2 as an abutment.

3. In a sash fastener, a lockin device for one sash having a spring actuatefl bolt, combined with a keeper for the other sash consistin of sheet metal bent into arch form with anges at the bottom for the attaching screws and having" a plurality of ratchet teeth directed toward the lockin device for cooperating with the bolt of the ocking device.

4. In a sash fastener, a locking device for one sash, combined with a keeper for the other sash consisting of sheet metal bent into arch form with flanges E H and a base plate G integral with the end of flange E and extending under both flanges for the attaching screws and having a plurality of engaging teeth D for cooperating with the bolt of the locking device.

JOHN s. RAPSON Witnesses R. M. HUNTER, R. M. KELLY. 

